What to Do If Your AC Blows Warm Air Suddenly

If your AC starts blowing warm air unexpectedly, first check the thermostat settings and ensure the system is set to cooling mode. Inspect the air filter for dirt or clogs, and make sure vents are open and unobstructed. If everything seems fine but the problem persists, it could indicate low refrigerant, a frozen coil, or a malfunctioning compressor — in which case calling a professional HVAC technician is the safest step.